Improvement in the manufacture of rubber or gutta-percha hose



weitet tant @aient @titille Letters Patent N 92,353, dated July 6, 1869.

IMPROVEMENT 1N THE MANUFAGTURE or' RUBBER on Gu'r'I'A-PEnorm HOSE.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it 'may concern Be it known that we, EDWARDL. PERRY and CHARLES MANHEIM, ofthe city, county, and State of NewYork, have invented anewand useful Improvement in Rubber or Gntta-Percha Hose; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference'being had to 'the accompanying drawings, forming part of this specification. j

The object of this invention is yto provide rubber hose, so protected at the ends as to prevent the canvas'fiv'om exposureto water or air, which', when so exposed, as it is now constructed, takes up the water by capillary attract-ion, and vretains it to such an extent, that the ends of thehose soon become weak and rotten, and burst bythe pressure of the water.'

Figure l represents a section of an end, previous to finishing, when constructed according to'our improvement.

Figure 2 represents the same when finished.

Figure 3 represents anend section, under a modiiied arrangement. v

Figure 4 represents the same when finished. l

Similar' letters of reference indicate corresponding parts.

In the present way of constructing India-rubber or gutta-percha hose, the edges of the canvas part are exposedto the air and water at the ends of the seetions, where they are coupled together, as represented at A.

The result of this exposure is that so much water is taken up by the capillary attraction of the canvas, that the latter, for a considerable distance from the ends, is, in the case of hose used on {ire-engines, nearly always wet, the conditions of the .canvas and rubber being very unfavorable for dryinlr.

Owing to the continued presence of water in tho canvas, it soon rots and loses its strength, and, consequently, the hose fails at the ends, while the remaining portion isgood.

Our invention consists in protecting the ends, by

providing extensions B of the rubber lining, and foldl ing them over the ends, previous to vulcaniziug, as represented at G, and afterwards vulcanizing them in this condition.

For fitting the lining snugly and squarely to the ends, we employ washers, with dat faces, iitting upon the mandrels on which the hose is vulcanized, and pro- `vided with means whereby they may be forced up snngl y against the ends, as shown in red at D.

We propose, also, when desired, to extend the` ex terior'rubber coating E in a similar manner, and first fold it down over the end of the lining, as'I shown 'at lf', and then fold it back, together with ,the lining, over the exterior, thereby obtaining greater thickness of rubber at the ends. l

Instead of extending the rubber lining orA exterior' coating, we may take a'washer of rubber or guttapercha, and fit it up to the end of the hosc,`on the mandrel, in advance of the metallic washer, and hernletically cover' the canvas, by the union of the said washer with the end of the hose, when vulcanized.

By this plan the canvas part of thc hose is hermetically closed in from the air and water, and the exposure to rot entirely prevented.

Having thus described our invention,

What we claim. as my new, and desire to secure by Letters Patent, is- 'l l Hcrmetically enclosing the canvas'part of Indiarubber or gutta percha hose at the ends, either by folding, over thesaid ends, extensions of the lining or exterior covering, or by the employment of rubber-or gutta-percha washers, the said enclosing parts being united in the process of vulcanizing, all substantially as specified.

lhe above specification of our invention .signed by us, this Sth day of April, 1869. v

EDWARD L. PERRY. CHARLES MANHEIM. p

Witnesses:

FRANK BLooxLnY, E. Gnnnnn COLLINS. 

